Spring Lake Max Depth
Greene County, IowaView mapDirections
Iowa DNR publishes the water-quality measurements for Spring Lake Max Depth. Here is what has been measured.
- Hypereutrophic
- Impaired · Turbidity
- 28 ft max depth
Spring Lake Max Depth in Greene County, Iowa has water-quality measurements published by Iowa DNR, shown here as reported. Water clarity: 0.9 ft visibility. Phosphorus: 77 µg/L. Chlorophyll-a (algae): 41.2 µg/L.
Free interactive depth-contour map of Spring Lake Max Depth, reaching a maximum surveyed depth of 6 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Iowa DNR.
Spring Lake Max Depth is a highly nutrient-loaded hypereutrophic lake in Greene County, Iowa with an estimated average depth of about 28 feet. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, Iowa DNR, last sampled 2024-09-04. Methodology: how these readings are compared.
Swimming conditions
Readings onlyRecreation use not supported
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Spring Lake Max Depth is listed impaired under Clean Water Act §303(d) (IR 4A) for turbidity. Check local advisories before you swim.
Whether Spring Lake Max Depth is safe to swim in today is a call for the Iowa Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Spring Lake Max Depth
These are the measurements Iowa DNR publishes for Spring Lake Max Depth, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 0.9 ft of visibility. Phosphorus 77 µg/L. Chlorophyll-a 41.2 µg/L. TSI 71.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 0.9ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 77µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 41.2µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 71 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Spring Lake Max Depth
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Spring Lake Max Depth typically sits around 80°F at the surface in August. Summer average is about 79°F. Usually warmest in Jul (about 81°F) and coldest in May (about 64°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (64°F) to its warmest (81°F).
Typical surface water temperature by month, from 26 field readings (2010–2023) via the EPA Water Quality Portal. See the full Spring Lake Max Depth water temperature breakdown →
Lake Details
Max depth
~28 ft est.
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Iowa has not published bathymetry for Spring Lake Max Depth.
Lake Size & Watershed
Watershed (drainage) area
111 sq mi
HydroLAKES / HydroSHEDS
Surface area
49 acres
HydroLAKES / HydroSHEDS
Shoreline
1.5 mi
HydroLAKES / HydroSHEDS
Elevation
1,004 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Stays via Stay22
Stays near Spring Lake Max Depth
Compare lakeside cabins, hotels, and vacation rentals near Spring Lake Max Depth in Greene County, Iowa — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Spring Lake Max Depth are listed below.
Top-rated places to stay near Spring Lake Max Depth
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Fishing Spring Lake Max Depth
Water Quality Trend: Worsening
Based on 4 years of monitoring (2021–2024).
Water clarity
Worsening4 years
Phosphorus
Improving-2.95 µg/L/yr4 years
Chlorophyll-a
Worsening+4 µg/L/yr4 years
EPA Impairment Status
Spring Lake Max Depth is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit IA 04-RAC-1152 · Official waterbody report
Nearby Lakes in Greene County
Frequently asked questions about Spring Lake Max Depth
Where is Spring Lake Max Depth?
- Spring Lake Max Depth is a lake in Greene County, Iowa. Its water-quality measurements are published by Iowa DNR and shown on this page as reported.
What is the water quality of Spring Lake Max Depth?
- Spring Lake Max Depth in Greene County, Iowa has water-quality measurements published by Iowa DNR, shown here as reported. Water clarity: 0.9 ft visibility. Phosphorus: 77 µg/L. Chlorophyll-a (algae): 41.2 µg/L.
Is Spring Lake Max Depth safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Spring Lake Max Depth is listed impaired under Clean Water Act §303(d) (IR 4A) for turbidity. Check local advisories before you swim.
What is the water temperature of Spring Lake Max Depth?
- Spring Lake Max Depth typically sits around 80°F at the surface in August, from 26 EPA Water Quality Portal field readings (2010–2023). That is a typical value for the month, not a live reading.
How deep is Spring Lake Max Depth?
- No published bathymetric survey covers Spring Lake Max Depth, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 28 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
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Where this data comes from
47 measurements from 1 monitoring station, 2021–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Iowa DNR Surface Water Monitoring Data
21IOWA_WQX47 samples · 2021–2024
Analytical methods
- Unknown
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- In-Vitro Determination of Chlorophyll
- ISU modification of APHA 2130-B
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)